As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON LANDING ROLL-OUT, RT MAIN AND NOSE GEAR COLLAPSED. DROP CHECK IN HANGAR WITH HAND PUMP SHOWED NO ABNORMALITIES DURING OPERATION. POWER PAK REMOVED AND SENT FOR TEAR DOWN INSPECTION. THEY FOUND BLOW HOLE IN MAIN HOUSING CASTING AT POPPET HOLE. EITHER FATIGUED OR A THIN WALL DEFECT EXISTED TO CAUSE BLOW-OUT RESULTING IN SYSTEM PRESSURE GOING BACK TO RESERVOIR OF POWER PAK.